<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <h1>我是b.html</h1>
  <script>
    // 获取a页面携带过来的参数
    console.log(location.search);
    // 把携带过来的中文，反编译过来 decodeURIComponent
    console.log(decodeURIComponent(location.search))
  </script>
</body>

</html>